Round|Natural|GIA

1.21ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6552175864

Certificate GIA 6552175864

Diamond specifications and retailer prices

From $1,793 USD
As of November 6, 2026
Save $3,238 USD (64%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $5,031 USD at NZ Jewellers · As of November 2, 2026
View at NZ Jewellers

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6552175864. Listed at 18 retailers as of November 2, 2026, with prices from $1,793 to $5,031, a $3,238 spread on the same certified stone. NZ Jewellers lists it at $5,031. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.21
Carat
J
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6552175864
Dimensions6.79 × 6.83 × 4.25 mm
L/W Ratio1.01
Girdle conditionSlightly Thick
Top View
6.79 mm6.83 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6552175864
Side View
Table 57.0%Crown 35.5°Girdle: MediumPavilion 41.2°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $5,031 USD|Low: $1,793 USD|High: $5,031 USD|Avg: $2,699 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 2$1,793 USD
Retailer 12$2,185 USD
Retailer 11$2,190 USD
Retailer 6$2,220 USD
Retailer 10$2,278 USD
Retailer 3$2,406 USD
Retailer 14$2,406 USD
Retailer 5$2,517 USD
Retailer 8$2,530 USD
Retailer 4$2,776 USD
Retailer 7$2,803 USD
Retailer 13$2,957 USD
Retailer 9$4,204 USD
NZ Jewellers$5,031 USD

28 data points across 14 retailers

18 retailers$1,793 USD to $5,031 USD

A
Cheapest Retailer
-
$1,793 USD
B+
Retailer 2
-
$2,174 USD
View
B+
Retailer 3
-
$2,185 USD
View
B+
Retailer 4
-
$2,190 USD
View
B+
Retailer 5
-
$2,220 USD
View
Final sale: no returns
B+
Retailer 6
-
$2,269 USD
View
B+
Retailer 7
-
$2,278 USD
View
B+
Retailer 8
-
$2,395 USD
View
B+
Retailer 9
-
$2,406 USD
View
Retailer 10
-
$2,406 USD
View
Price last confirmed 8 days ago
B+
Retailer 11
-
$2,517 USD
View
B+
Retailer 12
-
$2,530 USD
View
B
Retailer 13
-
$2,776 USD
View
B+
Retailer 14
-
$2,803 USD
View
B
Retailer 15
-
$2,957 USD
View
Retailer 16
-
$2,962 USD
View
Price last confirmed 30 days ago
B
Retailer 17
-
$4,204 USD
View
Most Expensive
B
NZ Jewellers
d4b92014-6fab-4719-bdf5-d39cdee6a9a9 · Nov 2
$5,031 USD
View
17 more retailers have this diamond
Prices start from $1,793 USDSave up to $3,238 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.21ct Round
$1,793 USD